New precipitation and temperature grids for northern Patagonia: Advances in relation to global climate grids

Bianchi, Emilio; Villalba, Ricardo; Viale, Maximiliano; Couvreux, Fleur; Marticorena, Rocio

doi:10.1007/s13351-015-5058-y

Cited by 49 publications

(43 citation statements)

References 26 publications

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“…During the MCA, reconstructed temperatures oscillated around the long-term mean ( Figure 1G). Most of the long-term periods with low temperatures in northern Patagonia showed abundant precipitations ( Figures 1G,F), a climatic pattern seen in current instrumental records during summer (Bianchi et al, 2016).…”

Section: Temperature and Precipitation Changes In The Extratropical Amentioning

confidence: 65%

Observed and Projected Hydroclimate Changes in the Andes

et al. 2020

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The Andes is the most biodiverse region across the globe. In addition, some of the largest urban areas in South America are located within this region. Therefore, ecosystems and human population are affected by hydroclimate changes reported at global, regional and local scales. This paper summarizes progress of knowledge about long-term trends observed during the last two millennia over the entire Andes, with more detail for the period since the second half of the 20th century, and presents a synthesis of climate change projections by the end of the 21st century. In particular, this paper focuses on temperature, precipitation and surface runoff in the Andes. Changes in the Andean cryosphere are not included here since this particular topic is discussed in other paper in this Frontiers special issue, and elsewhere (e.g. IPCC, 2019b). While previous works have reviewed the hydroclimate of South America and particular sectors (i.e., Amazon and La Plata basins, the Altiplano, Northern South America, etc.) this review includes for the first time the entire Andes region, considering all latitudinal ranges: tropical (North of 27 • S), subtropical (27 • S−37 • S) and extratropical (South of 37 • S). This paper provides a comprehensive view of past and recent changes, as well as available climate change projections, over the entire Andean range. From this review, the main knowledge gaps are highlighted and urgent research necessities in order to provide more mechanistic understanding of hydroclimate changes in the Andes and more confident projections of its possible changes in association with global climate change. Keywords: hydroclimate of the Andes, global change in the Andes, hydroclimate trends in the Andes, hydroclimate projections of the Andes, climate change in the Andes, climate change scenarios for the Andes

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Section: Temperature and Precipitation Changes In The Extratropical Amentioning

confidence: 65%

Observed and Projected Hydroclimate Changes in the Andes

et al. 2020

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“…The orographic lifting of these winds triggers, along with the synoptic lifting from mid-level low pressure or equatorward fronts, abundant convective precipitations on the eastern slope of the Andes (e.g., Vuille, 1999;Espinoza et al, 2015). South of 35 • S in the extratropics, the prevailing westerlies from the Pacific and their associated frontal precipitation systems are deprived of moisture when passing over the relatively narrow (<150 km) and low (∼1,500 m) Andes, raining over the western slopes and drying over the eastern slopes (e.g., Miller, 1976;Garreaud et al, 2013;Bianchi et al, 2016;Viale et al, 2018). In the transition (25-35 • S) between the tropics and the extratropics, climate in the Andes resembles that of the extratropics with wintertime precipitation falling mostly on the western slopes (e.g., Falvey and Garreaud, 2007;Viale and Nuñez, 2011), and that of the tropics with summer precipitation falling mostly on the eastern slopes (e.g., Viale and Garreaud, 2014).…”

Section: Introductionmentioning

confidence: 99%

Contrasting Climates at Both Sides of the Andes in Argentina and Chile

Viale

Bianchi

Cara

et al. 2019

Front. Environ. Sci.

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“…Within the extended Patagonian region (39°S to 55°S), the northernmost area presents marked seasonality in the precipitation regime, with well-defined wet (fall-winter) and dry (spring-summer) seasons (Bianchi, Villalba, Viale, Couvreux, & Marticorena, 2016;Paruelo, Beltran, Jobbagy, Sala, & Golluscio, 1998). Furthermore, this region experiences high solar radiation levels, especially UV, from the beginning of the dry season, which promotes photo-induced chemical and biological DOM processing (Zagarese, Tartarotti, Cravero, & Gonzalez, 1998).…”

Section: Introductionmentioning

confidence: 99%

Interplay between climate and hydrogeomorphic features and their effect on the seasonal variation of dissolved organic matter in shallow temperate lakes of the Southern Andes (Patagonia, Argentina): a field study based on optical properties

et al. 2017

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This study analyses the effects of the interplay between climate seasonality and hydrogeomorphic (HGM) lake features on dissolved organic matter (DOM) properties in two neighbouring shallow lakes of Andean Patagonia with different connectivities. The survey was conducted over three years at the end of the wet and dry seasons, assessing the seasonal and interannual variation of dissolved organic carbon (DOC) concentration, whole-lake DOC mass, and DOM quality, through chromophoric and fluorescent DOM (CDOM and FDOM, respectively) properties. During the wet season (fall-winter), precipitation and runoff increased water discharge, water level, and inputs of terrestrial DOM with high aromaticity, humic content, and high molecular weight in both lakes. Contrastingly, during the dry season (spring-summer), in which photodegradation promoted by high irradiance and stagnant conditions drove DOM transformation, nonhumic, low-molecular-weight DOM prevailed. Both lakes displayed synchronicity in their DOC mass and CDOM and FDOM properties, indicative of similar responses to climate forcing, although the overall impact was modulated by their HGM features. Conversely, DOC concentration showed asynchronous responses between lakes, due to the higher intensity of the dilution or evapoconcentration processes in the connected lake, highlighting that DOC concentration is not always sensitive to climate-driven forces. Overall, this study emphasizes the importance of variables other than DOC concentration, like whole-lake DOC mass, DOM quality, and HGM features, to better understand the effect of climate variability on DOM dynamics. Our results allow inferring the potential impact of an environmental scenario characterized by lower precipitation and sustained warming on DOM dynamics in Northern Andean Patagonia.

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New precipitation and temperature grids for northern Patagonia: Advances in relation to global climate grids

Cited by 49 publications

References 26 publications

Observed and Projected Hydroclimate Changes in the Andes

Observed and Projected Hydroclimate Changes in the Andes

Contrasting Climates at Both Sides of the Andes in Argentina and Chile

Interplay between climate and hydrogeomorphic features and their effect on the seasonal variation of dissolved organic matter in shallow temperate lakes of the Southern Andes (Patagonia, Argentina): a field study based on optical properties

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